Dry coal shed is a large warehouse for storing coal in thermal power plants. The dry coal shed structure requires large span and high headroom to meet storage and operation space.
The spherical space frame structure of the dry coal shed has been developed for twenty years. The structural forms used mainly include plane rigid frame, plane truss, plane arch and cylindrical reticulated shell structure. According to the comparison of the technical and economic indicators of the built dry coal shed structure, the cylindrical reticulated shell has obvious advantages and has become the main structural form of the dry coal shed structure.
Generally speaking, the main function of the spherical space frame of dry coal shed is to cover the coal yard to prevent the coal from being drenched when it rains, and polluting the environment when it is windy. It is an energy saving and environmental protection project. The architectural function of the dry coal shed is mainly a large storage warehouse, so it must have a certain storage and working space, that is, the structure must be able to meet certain clearance requirements. Moreover, the cross-sectional shape of its effective space is trapezoidal, and the envelope of the working space is close to arc.
The length and width of the dry coal shed space frame structure are determined according to the needs of installed capacity, while the height of the structure is determined by the operation requirements of coal stacking and bucket wheel machines. Therefore, the characteristics of the dry coal shed structure are large span, high height, and wide coverage area. The space frame structure is adopted to reduce the roof bearing capacity. Generally speaking, 40-70 kg of steel is used per square meter of projected area. With the development of power industry, the spherical space frame of dry coal shed has been extensively constructed and researched.